This is just the outer threaded collar that is tapered to fit outside of the split collar halves "collets" (part # 3106) that are also tapered. All 3 pieces install onto the king pin of your 5th Wheel, allowing installation of the base of the Ranch Hitch Adapter.

1 piece collar system

Tapered to ensure a tight and secure installation

IMPORTANT: Make sure the "X" on both inside collets are pointed down when installing